This 2004 installment, which received Oscar nominations for its special effects and John Williams' score, finds Harry, Ron, and Hermione, now teenagers, in their third year at Hogwarts, where they study the art of Divination and visit the Shrieking Shack, considered the most haunted building in Britain. They also encounter escaped prisoner Sirius Black (Gary Oldman), who poses a great threat to Harry. Before it's over, Harry must overcome the soul-sucking Dementors, outsmart a dangerous werewolf, and finally deal with the truth about Sirius Black and his relationship to Harry and his parents.